noun
1. : any of various squirrels distinguished by folds of skin connecting the forelegs and hind legs that enable them to make very long gliding leaps ; especially : a small large-eyed nocturnal No. American squirrel ( Glaucomys volans ) with very soft fur that is gray or brownish above and pure white below — see petauristidae , taguan
2. Australia : flying phalanger
3. : an African scaletail